/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.flink.connector.clickhouse.internal.partitioner;

import org.apache.flink.connector.clickhouse.internal.schema.ClusterSpec;
import org.apache.flink.connector.clickhouse.internal.schema.ShardSpec;
import org.apache.flink.table.data.RowData;

import java.util.List;
import java.util.concurrent.ThreadLocalRandom;

/** Shuffle data by random numbers. */
public class ShufflePartitioner extends ClickHousePartitioner {

    public ShufflePartitioner() {}

    @Override
    public int select(RowData record, ClusterSpec clusterSpec) {
        List<ShardSpec> shards = clusterSpec.getShards();
        int index = ThreadLocalRandom.current().nextInt(shards.size());
        return shards.get(index).getNum();
    }
}
